Abstract:
:MicroRNAs (miRNAs) loss-of-function phenotypes are mainly induced by chemically modified antisense oligonucleotides. Here we develop an alternative inhibitor for miRNAs, termed 'small RNA zipper'. It is designed to connect miRNA molecules end to end, forming a DNA-RNA duplex through a complementary interaction with high affinity, high specificity and high stability. Two miRNAs, miR-221 and miR-17, are tested in human breast cancer cell lines, demonstrating the 70∼90% knockdown of miRNA levels by 30-50 nM small RNA zippers. The miR-221 zipper shows capability in rescuing the expression of target genes of miR-221 and reversing the oncogenic function of miR-221 in breast cancer cells. In addition, we demonstrate that the miR-221 zipper attenuates doxorubicin resistance with higher efficiency than anti-miR-221 in human breast cancer cells. Taken together, small RNA zippers are a miRNA inhibitor, which can be used to induce miRNA loss-of-function phenotypes and validate miRNA target genes.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Meng L,Liu C,Lü J,Zhao Q,Deng S,Wang G,Qiao J,Zhang C,Zhen L,Lu Y,Li W,Zhang Y,Pestell RG,Fan H,Chen YH,Liu Z,Yu Zdoi
10.1038/ncomms13964subject
Has Abstractpub_date
2017-01-03 00:00:00pages
13964issn
2041-1723pii
ncomms13964journal_volume
8pub_type
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